Accession Number : ADA328921

Title :   Contrast Enhancement of Mammograms by Optical Polarization of the Viewing Environment.

Descriptive Note : Annual rept. 15 May 96-14 May 97,

Corporate Author : FOOD AND DRUG ADMINISTRATION WASHINGTON DC

Personal Author(s) : Spelic, David C.

PDF Url : ADA328921

Report Date : JUN 1997

Pagination or Media Count : 18

Abstract : The purpose of this research was to investigate the optical polarimetric properties of mammography films and determine whether visual contrast may be improved by exploiting such properties with a suitable viewing environment. Scope: The major efforts of the first year of this investigation have concentrated on experimental design and procedure development, preliminary studies of a selected mammography film type for prominent polarimetric properties, and data analysis procedures for Mueller matrix analysis. Major findings: Preliminary analysis of the mammography film selected shows that there are definite polarimetric properties displayed by the film. A subtle effect on the observed linear polarization due to film optical density variations warrants further, more rigorous study than that completed thus far. It was also found that the film's plastic base itself displays prominent retardance which will need to be considered when isolating potential candidates for further testing.

Descriptors :   *LINEAR POLARIZATION, *BREAST CANCER, *MAMMOGRAPHY, OPTICAL PROPERTIES, OPTICS, CONTRAST, ENVIRONMENTS, EXPERIMENTAL DESIGN, FILMS, POLARIMETRY, X RAYS, VISION.

Subject Categories : Medicine and Medical Research
      Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE